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OptoMOS 1-Form-A (SPST-NO) Solid State Relays

Littelfuse offers an extensive portfolio of 1-Form-A (SPST-NO) Solid State Relays (SSRs) in various PC board-mount package sizes. These relays feature load current ratings from 50mA to 9A (20A with heat sink), and 30V to 1000V load voltage ratings. 1-Form-A relays are available in SOP-4, SIP-4, SMD DIP-4, SMD DIP-6, SOIC-16, Power i4-PAC, and ISOPLUS-264 packages. Fault-protected SSRs with active current limit and thermal shutdown are also available from Littelfuse to offer robust and rugged switching solutions.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.
Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay CPC1560GS IXYS Integrated Circuits 1: $8.36 3,298On Order End of Life	Mfr. Part No. CPC1560GS Mouser Part No 849-CPC1560GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 600mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	3,298On Order On Order Ship Dates Mfr. No: CPC1560GS Stock: 0 On Order: 2,298 Expected 2027/05/17 1,000 Expected 2027/12/29 Factory Lead Time: 54 Weeks	$8.36 $7.84 $6.97 $6.62 View $6.27 $5.85	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1978J IXYS Integrated Circuits 1: $25.48 860On Order End of Life	Mfr. Part No. CPC1978J Mouser Part No 849-CPC1978J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	860On Order On Order Ship Dates Mfr. No: CPC1978J Stock: 0 On Order: 160 Expected 2026/12/21 375 Expected 2027/03/31 325 Expected 2027/05/06 Factory Lead Time: 54 Weeks	$25.48 $23.42 $22.19 $20.97	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SPST iso PLUS-264 CPC1979J IXYS Integrated Circuits 1: $40.23 6,034On Order End of Life	Mfr. Part No. CPC1979J Mouser Part No 849-CPC1979J End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST iso PLUS-264 Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	6,034On Order On Order Ship Dates Mfr. No: CPC1979J Stock: 0 On Order: 209 Expected 2026/12/02 5,825 Expected 2027/12/10 Factory Lead Time: 73 Weeks	$40.23 $35.97 $34.29 $33.04	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation CPC1983Y IXYS Integrated Circuits 1: $10.73 7,435On Order End of Life	Mfr. Part No. CPC1983Y Mouser Part No 849-CPC1983Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A; 600V,0.5A 2500Vrms Isolation Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,435On Order On Order Ship Dates Mfr. No: CPC1983Y Stock: 0 On Order: 610 Expected 2026/11/18 6,825 Expected 2027/07/29 Factory Lead Time: 40 Weeks	$10.73 $9.83 $9.04 $8.64 View $8.13 $7.76	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount RELAY, SS ICS CPC1983YE IXYS Integrated Circuits 1: $10.96 12,866On Order End of Life	Mfr. Part No. CPC1983YE Mouser Part No 849-CPC1983YE End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount RELAY, SS ICS Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	12,866On Order On Order Ship Dates Mfr. No: CPC1983YE Stock: 0 On Order: 7,016 Expected 2026/11/18 5,850 Expected 2027/02/15 Factory Lead Time: 37 Weeks	$10.96 $10.19 $9.33 $9.00 View $8.69 $8.30	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 100V 300mA Double Pole Relay LAA108STR IXYS Integrated Circuits 1: $5.33 7,000On Order End of Life	Mfr. Part No. LAA108STR Mouser Part No 849-LAA108STR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 100V 300mA Double Pole Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,000On Order On Order Ship Dates Mfr. No: LAA108STR Stock: 0 On Order: 5,000 Expected 2027/07/28 2,000 Expected 2027/07/30 Factory Lead Time: 36 Weeks	Cut Tape $5.33 $4.81 $4.44 $4.21 View Reel $3.51 $4.01 $3.83 $3.70 $3.51 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Triac & SCR Output Optocouplers AC SS Power Switch Dual Power SCR Out CPC1976YX6 IXYS Integrated Circuits 1: $10.61 455Expected 2027/02/22	Mfr. Part No. CPC1976YX6 Mouser Part No 849-CPC1976YX6	IXYS Integrated Circuits	Triac & SCR Output Optocouplers AC SS Power Switch Dual Power SCR Out Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	455Expected 2027/02/22	$10.61 $8.65 $7.49 $7.04	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A SSR LCA701 IXYS Integrated Circuits 1: $11.89 707Expected 2026/11/16	Mfr. Part No. LCA701 Mouser Part No 849-LCA701	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	707Expected 2026/11/16	$11.89 $10.44 $9.96 $9.51 View $9.07 $8.12	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A LCA710R IXYS Integrated Circuits 1: $9.99 946Expected 2027/07/21	Mfr. Part No. LCA710R Mouser Part No 849-LCA710R	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole OptoMOS 1-Form-A, 60V, 1A Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	946Expected 2027/07/21	$9.99 $9.40 $8.42 $8.01 View $7.68 $7.33	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET LCA712STR IXYS Integrated Circuits 1: $11.25 1,600Expected 2027/01/21	Mfr. Part No. LCA712STR Mouser Part No 849-LCA712STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 60V 1000 mA SSR w/optic MOSFET Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,600Expected 2027/01/21	Cut Tape $11.25 $10.03 $9.57 $9.22 View Reel $7.50 $8.83 $8.26 $7.97 $7.50 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay LCA717S IXYS Integrated Circuits 1: $10.92 2,180Expected 2026/10/23	Mfr. Part No. LCA717S Mouser Part No 849-LCA717S	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form 30V 2000 mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,180Expected 2026/10/23	$10.92 $10.23 $9.09 $8.64 View $8.19 $7.48 $7.23 $6.98	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP PAA110 IXYS Integrated Circuits 1: $14.32 485On Order	Mfr. Part No. PAA110 Mouser Part No 849-PAA110	IXYS Integrated Circuits	Solid State Relays - PCB Mount DPST-NO/NO 8PIN DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	485On Order On Order Ship Dates Mfr. No: PAA110 Stock: 0 On Order: 85 Expected 2027/01/13 400 Expected 2027/05/17 Factory Lead Time: 35 Weeks	$14.32 $12.72 $12.10 $11.25 $10.85	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR PAA150 IXYS Integrated Circuits 1: $14.22 192On Order	Mfr. Part No. PAA150 Mouser Part No 849-PAA150	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 250V 250mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	192On Order On Order Ship Dates Mfr. No: PAA150 Stock: 0 On Order: 92 Expected 2027/05/24 100 Expected 2027/07/19 Factory Lead Time: 36 Weeks	$14.22 $12.65 $12.05 $11.41 $11.03	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR PAA191S IXYS Integrated Circuits 1: $14.64 712Expected 2027/03/17	Mfr. Part No. PAA191S Mouser Part No 849-PAA191S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 400V 250mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	712Expected 2027/03/17	$14.64 $13.05 $12.47 $12.01 View $11.61 $11.07	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA PLA192S IXYS Integrated Circuits 1: $7.08 1,825On Order	Mfr. Part No. PLA192S Mouser Part No 849-PLA192S	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,825On Order On Order Ship Dates Mfr. No: PLA192S Stock: 0 On Order: 875 Expected 2026/11/23 500 Expected 2026/12/07 450 Expected 2027/04/16 Factory Lead Time: 35 Weeks	$7.08 $6.32 $6.04 $5.83 View $5.62 $5.37	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA PLA192STR IXYS Integrated Circuits 1: $7.20 34In Stock 2,000Expected 2027/07/26	Mfr. Part No. PLA192STR Mouser Part No 849-PLA192STR	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single-Pole Relay 600V 150mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	34In Stock 2,000Expected 2027/07/26	Cut Tape $7.20 $6.58 $6.11 $5.80 View Reel $4.78 $5.55 $5.27 $5.09 $4.78 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR CPC1009NTR IXYS Integrated Circuits 1: $3.04 7,741On Order End of Life	Mfr. Part No. CPC1009NTR Mouser Part No 849-CPC1009NTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Dual 1-Form-A 100V 150mA SSR Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	7,741On Order On Order Ship Dates Mfr. No: CPC1009NTR Stock: 0 On Order: 5,741 Expected 2027/05/24 2,000 Expected 2027/08/02 Factory Lead Time: 36 Weeks	Cut Tape $3.04 $2.76 $2.54 $2.47 View Reel $1.97 $2.38 $2.28 $2.17 $1.97 $1.97 MouseReel Available	Min.: 1 Mult.: 1 : 2,000
Solid State Relays - PCB Mount SPST-NO 4PIN SOP CPC1030N IXYS Integrated Circuits 1: $3.94 1,817Expected 2027/04/19 End of Life	Mfr. Part No. CPC1030N Mouser Part No 849-CPC1030N End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SOP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,817Expected 2027/04/19	$3.94 $3.51 $3.36 $3.23 View $3.11 $2.95 $2.87 $2.77	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount Single Pole Relay 400V 140mA CPC1390GR IXYS Integrated Circuits 1: $4.57 600Expected 2026/12/02 End of Life	Mfr. Part No. CPC1390GR Mouser Part No 849-CPC1390GR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount Single Pole Relay 400V 140mA Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	600Expected 2026/12/02	$4.57 $4.12 $3.85 $3.69 View $3.54 $3.38	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation CPC1394G IXYS Integrated Circuits 1: $5.00 500Expected 2026/12/28 End of Life	Mfr. Part No. CPC1394G Mouser Part No 849-CPC1394G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A; 600V,120mA 5000Vrms Isolation Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	500Expected 2026/12/28	$5.00 $4.57 $4.29 $4.14 View $4.00 $3.79 $3.69	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay CPC1510GS IXYS Integrated Circuits 1: $6.94 2,502On Order End of Life	Mfr. Part No. CPC1510GS Mouser Part No 849-CPC1510GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 250V 200mA Solid State Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	2,502On Order On Order Ship Dates Mfr. No: CPC1510GS Stock: 0 On Order: 1,752 Expected 2026/11/23 750 Expected 2027/12/29 Factory Lead Time: 61 Weeks	$6.94 $6.09 $5.80 $5.61 View $5.41 $5.16	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay CPC1563GS IXYS Integrated Circuits 1: $6.68 1,100Expected 2026/12/10 End of Life	Mfr. Part No. CPC1563GS Mouser Part No 849-CPC1563GS End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SP, Normally-Open OptoMOS Relay Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,100Expected 2026/12/10	$6.68 $6.11 $5.62 $5.33 View $5.14 $4.90	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin DIP CPC1593G IXYS Integrated Circuits 1: $6.52 499Expected 2027/11/03 End of Life	Mfr. Part No. CPC1593G Mouser Part No 849-CPC1593G End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin DIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	499Expected 2027/11/03	$6.52 $5.82 $5.55 $5.35 View $5.18 $4.56	Min.: 1 Mult.: 1
Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R CPC1593GSTR IXYS Integrated Circuits 1: $6.23 1,742Expected 2027/11/04 End of Life	Mfr. Part No. CPC1593GSTR Mouser Part No 849-CPC1593GSTR End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount 1-Form-A 600V 6-Pin SM T/R Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	1,742Expected 2027/11/04	Cut Tape $6.23 $5.55 $5.30 $5.12 Reel $4.47 View $4.95 $4.71 $4.61 $4.44 MouseReel Available	Min.: 1 Mult.: 1 : 1,000
Solid State Relays - PCB Mount SPST-NO 4PIN SIP CPC1906Y IXYS Integrated Circuits 1: $12.51 289Expected 2027/07/23 End of Life	Mfr. Part No. CPC1906Y Mouser Part No 849-CPC1906Y End of Life	IXYS Integrated Circuits	Solid State Relays - PCB Mount SPST-NO 4PIN SIP Learn More about IXYS Integrated Circuits littelfuse optomos 1 form a ssrs	Datasheet	289Expected 2027/07/23	$12.51 $11.15 $10.62 $10.28 View $9.91 $8.68	Min.: 1 Mult.: 1